From the course: Cert Prep: SNCP Foundations (S10-110)
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Block IO over Ethernet
From the course: Cert Prep: SNCP Foundations (S10-110)
Block IO over Ethernet
- [Instructor] So far we've put a lot focus on the fiber channel but let's also be aware that iSCSI is a related and very viable protocol that does very much the same thing as fiber channel. And let's go through the details of how it works, and why it works and what its strengths and weaknesses are. So iSCSI is Block IO, except its over ethernet rather than over fiber channel. There's some vocabulary you'll need to become familiar with. So an iSCSI initiator is the thing that runs the application. So you've got a database or an email server, that's the initiator. And the iSCSI target is where the storage is. So the thing with the disk drives and the SSDs. That's the iSCSI target. Typical there are two NICs, network interface cards. This is basically a standard ethernet card. And the reason why there are two of them relate to no single point of failure and failover types of operations. iSCSI speaks of variation of the ethernet protocol. So here you see in dark blue the standard…
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